With reference to React Router v4 <NavLink> vs <Link> benefits and the official documentation, NavLink is a variant of Link that allows you to apply styling attributes when it is the active link. These styling attributes do not appear to be mandatory, and I haven't found anything describing the pros of using Link.
If that's the case, why not just use NavLink everywhere? Are there any reasons to choosing Link over NavLink? Functionality perhaps, or better performance?